Ozone Depletion Causes Effects and Solutions

The video discusses ozone depletion, its causes, and effects. It covers ozone-depleting substances like CFCs and HCFCs, the role of polar stratospheric clouds, and the Antarctic ozone hole. The effects on health, agriculture, and marine life are highlighted. Measures like the Montreal Protocol are discussed, along with future challenges and solutions. Practice questions are provided for exam preparation.

What is the primary cause of ozone depletion?

• Deforestation

• Increased solar activity

• Human-made chemicals releasing chlorine and bromine

• Natural volcanic eruptions

Which substance is considered the most significant contributor to ozone depletion?

• Carbon dioxide

• Chlorofluorocarbons (CFCs)

• Methane

• Sulfur dioxide

What role do polar stratospheric clouds play in ozone depletion?

• They reduce greenhouse gas emissions

• They block UV radiation

• They convert benign chlorine into reactive forms

• They increase atmospheric pressure

When does the Antarctic ozone hole typically form?

• September to November

• June to August

• December to February

• March to May

What is a major health effect of increased UV radiation due to ozone depletion?

• Reduced allergy symptoms

• Enhanced vision

• Improved bone density

• Increased risk of skin cancer

How does ozone depletion affect marine life?

• It enhances coral growth

• It reduces ocean salinity

• It damages phytoplankton

• It increases fish population

What international treaty was signed to reduce ozone-depleting substances?

• Geneva Convention

• Kyoto Protocol

• Montreal Protocol

• Paris Agreement

What is a challenge in achieving full recovery of the ozone layer?

• Global cooling

• Increased volcanic activity

• Introduction of new ozone-depleting substances

• Lack of scientific research

Which of the following is a greenhouse gas that also contributes to ozone depletion?

• Oxygen

• Argon

• Hydrofluorocarbons (HFCs)

• Nitrogen

What is a recommended action to further protect the ozone layer?

• Increase fossil fuel usage

• Launch public awareness campaigns

• Promote deforestation

• Ban all industrial activities